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I'm looking for a way to reverse a CRC32 checksum. There are solutions around, but they are either badly written, extremely technical and/or in Assembly. Assembly is (currently) beyond my ken, so I'm hoping someone can piece together an implementation in a higher level language. Ruby is ideal, but I can parse PHP, Python, C, Java, etc.
Any takers?
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A CRC32 is only reversible if the original string is 4 bytes or less.
Return type The CRC32 function returns an 8-character string that is a text representation of the hexadecimal value of a 32-bit binary sequence.
It's reasonably fast (375 MByte/s on my computer) and comes with only a small memory overhead. Often the look-up table isn't pre-computed at runtime but rather stored as a large table in the C code.
CRC32 is a popular checksum algorithm used to detect data corruption. Multiple variants of the algorithm exist which have similar mathematical properties.
A CRC32 is only reversible if the original string is 4 bytes or less.
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